Machine for pressing carbon electrodes



Aug. 24 1926. 1,597,376

r w.. HASSE MACHINE FOR PRESSING CARBON ELECTRODES Filed Jan. 24. 1525 2Sheets-Shasta Fig.1.

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Filed Jan. 24, 1925 2 Sheets-Shget 2 again to its lowermost PatentedAug. 24, 1926. i

warren stares 1,597,376 PATENT orr cs.

WILI-IELM HASSE, on BERLIN, GERMANY.

MACHINE FOR PRESSING CARBON ELECTRODES.

" Application filed January'24, 1925, Serial No.4,511, and in GermanyJune 17, 1924.

This invention relates to improvements in amachine for pressing carbonelectrodes with pressed-in projecting pocketlamp batteries and similarmouldings, the punch and ejector arranged perpendicularly aboveoneanother being set in up. and down motion by means of a known crankdrivingmechanism or crank-disc and the presstable in stepwise rotarymotion by means of a gear ring. Furthermire, the pressing of theelectrodes, as soon as the press-table is in its position of rest, bymeans of the down \vardly moving punch, and immediately thereupon aslight lifting of the mouldin by means of the ejector underneath, aree"- fected by means ofa cam disc. As soon as the press-table is. set inrotation, the ejector fitted with pressure rollers is moved up wards bythe upward incline of a stationary guiding cam, whereby the ejectioniscompleted. Upon the further rotation of the presstable the ejector is.held at a certain height until the finished carbon electrode isremoved, before further rotation brings it position by the decline ofthe guiding cam.

As soon as the ejector holder with ejector assumes its lowermostposition, according to the invention, the moulds are again automaticallyfilled with fresh paste, which is compressed therein by a plungerarranged above the press-table. The machine is not only adapted forpressing small pocket-lamp electrodes, but also large electrodes, itperforming about 30 crank strokes per minute, which means a capacity perday of 14.000 pieces with ordinary moulds and of 42000 pieces withthree-part moulds. The maxi.- mum capacity per day hitherto attained byhand working amounted to about 3000 pieces.

The accompanying drawings illustrate the improved machine: Figs. 1 and 2are respec-' tively a sectional front view and a plan view of the same,while Fig. 3 is a side view thereof in the direction of the arrow inFig. 1, and, Fig. 4 is a diagram indicating the movement of the pasteand showing a plan view of the crank-disc with its accessories, Fig. 4being a side view of the latter; Fig. 5 is a plan view of part of thegear ring.

The machine is driven by a pulley 1 and toothed wheels 2, 3 which setthe crank d in motion. The latter moves the crank-bar c with theguide-piece I) up and down, the

carbon for electric punch holder p being fixed on saidguide m of theroller Z of theejector framing 0 2 At an angle of about 90 from themiddle position begins m the largestheight of the cam which extendsthrough a further angle of about the cam being then gradually declinedthrough a further angle of about.

95. Before the roller Z arrives upon the guiding cam Z it is somewhatlifted with the ejector framing of by the cam n and the pivoted part aon which it rides and which co-operates with the cam n (Fig. so that themoulding in the mould is also somewhat lifted toward the ejectionopening, whereby it is attained that the strongest initial pressureduring the ejection is not to be taken-up by the guiding cam Z butexerted by the cam a.

The ejector holder o with roller Z and ejector Q7 are guided by the pinsv fixe'd on the presstable.

The operation is as follows :-After the moulds r in front of the punchhave been continuously provided with a carbon and filled with paste, andas soon as the first filled mould arrives in the middle position onbeneath the punch or ejector respectively, the pressing of the firstcarbon electrode takes place by the downward movement of the punch 39 Byan upward movement of the ejector the finished moulding is somewhatlifted from the mould by the ejector, which is firmly arranged on theejector holder, by means of the cam disc until the roller Z slides uponthe guiding-cam Z in order to be positively guided as soon as the tableis set in motion. The roller holders o for the rollers Z are firmlyarranged on the ejector framing o carrying the ejector tools 41 so thatthe latter execute the salne up and down movement as the rollers alongthe cam. By this arrangement, a continuous working required forwholesale manufacture is ensured.

According to the invention, the paste is filled in themoulds as follows:Upon the moulds 1 having passed beyond the two first stripping-oftplanes 2 their openings are filleo with loose paste. In the nextposition, the filled mouldarrives beneath the plunger a where the loosepaste is compressed to about middle of the mould. During the furtherstep-wise movement of thepress-table;

the moulds with the previously pressed paste pass alongthe otherstripping-off planes 2] and are there again filled with loose paste,-

in contact with the iron of the press-table.

The moulds, for instance 18 of them, are fixed on the press-table.

Above the Wood coating a receiver 00 is firmly arranged on which thepaste is stored and from which it is gradually delivered 7 30 onto thewooden coating. On the latter allatter are filled with loose paste.

The press-table i .is..covered'by a waysso much paste must be availablethat the'moulds can be filled by the strippingottplanes sand the plunger(ll. Said stripping-off planes are so arranged on the stationaryreceiver a; that the paste on the press-table is permanently agitatedabove the openings of the 11101116187 whereby the To sufficiently fillthe moulds, it is recommendable to compress the paste once or severaltimes.

For thispurpose, the plunger 6; is. provided and adapted to be-operatedfrom the driv-- ing gear of the machineL .The degree of compressionofthe' paste depends uponthe compactness of the finished product de-.

sired; I

That I'cla1m, 1s: In a machlne for pressing carbon electrodes, thecombination with a stepwise rotary press-table, open moulds thereon, andstationary stripping-off planes, of an up and down movableplungerarranged above said press-table intermediate said strippingofiplanes and adapted toengage from to time in said moulds, substantiallyas and for the purpose set forth;

In testimony whereof I have hereunto set my hand.

WILHELM HASSEi

